Belimo FSLF, FSNF, FSAF Series
Belimo's broad product line of fire and smoke actuators covers the established range of system applications including active smoke control for stairwell, under-floor and other pressurization applications. Kele is the leading supplier of building automation products. When you need the right product, right now, count on Kele.
Pressure Multi-sensor Differential Zone Pressure Transmitters
BAPI's Zone Pressure Multi-Sensor ZPM Series is the most flexible pressure sensor on the market. Output, range, units, directionality, and response time are quickly set in the field with no tools, no power and no small components.
The optional LCD display helps with troubleshooting because it displays the actual differential pressure over the entire operational range regardless of which individual pressure range is selected for output to the system controller. Three LEDs on the face of the unit indicate when the pressure is ″Out of Range Low″, ″In Range″ or ″Out of Range High″. When you need the right product, right now, count on Kele.
Tech Talk: How do surge suppressors protect circuits from harmful voltages?
A: The short answer is that they shunt (“short out”) the high voltage to ground
Each surge suppressor is connected to a specific circuit. It switches the connected power—or communication circuit—to earth ground much like an automatic “Off/On” switch. Or if the surge device is a fuse, it opens the connection, thus protecting the main device. The trick is to clamp at a voltage high enough for the control circuit to operate normally while dissipating highly damaging voltage to ground. This is called the “clamp level voltage” of the surge protector
Certain high voltages happen very fast—sometimes as fast as microseconds (µ sec). Lightning is a perfect example. The table below shows many of the devices…
Guidelines for Replacement of Old Fire and Smoke Actuators
For Belimo combination fire/smoke damper actuators intended for installation in accordance with National Protection Association Standard for Installation of Air Conditioning and Ventilating Systems, NFPA 90A, damper actuators must meet the construction and performance requirements in UL555: Standard for Fire Dampers and UL555S: Standard for Smoke Dampers. Often, customers replace damper actuators for varying reasons such as rusted, aged or damaged parts. Only an individual with field experience should replace these types of damper actuators
The wiring diagram below illustrates roughly 75% of all applications that are in use today
Dampers do not need to be replaced unless they are non-functional. It is crucial when determining the need to replace damper actuators, that parts are carefully…
Kele, Inc. Completes Acquisition of MIControls, Inc.
Acquisition strengthens both companies’ service to the Western United States
MEMPHIS, Tenn. and SEATTLE – Kele, Inc. today announced the acquisition of MIContols, Inc. The acquisition expands Kele’s footprint and enhances its ability to serve customers in the Western United States. MIControls, which is co-located in Seattle and Portland, Ore., will increase its service offering through new products, customer programs, and technology capabilities
Kele President and CEO Richard Campbell says the move benefits both Kele and MIControls customers, and accomplishes another goal within Kele’s strategic growth plan
“This strategic combination brings together two value-added distributors,” says Campbell. “It highlights both Kele’s and MIControls’ commitments to providing industry leading products and solutions to our customers.”
Application Tips: Determining Air Flow in Cubic Ft./ Min
To calculate Air Flow in Cubic Feet per Minute (CFM), determine the Flow Velocity in feet per minute, then multiply this figure by the Duct Cross Sectional Area
Air Flow in CFM (Q) = Flow Velocity in Feet Per Minute (V) x Duct Cross Sectional Area (A)
Determining Flow Velocity
The easiest way to determine Flow Velocity is to measure the Velocity Pressure in the duct with a Pitot Tube Assembly connected to a differential pressure sensor. The Pitot Tube Assembly includes a Static Pressure Probe and a Total Pressure Probe.
A Total Pressure Probe, aligned into the airflow, senses the duct velocity pressure and the static pressure, which equals the total pressure. A Static Pressure Probe aligned at a right angle to the airflow senses only the static pressure. The difference between…